Remove max-specpdl-size overrun test

Remove max-specpdl-size overrun test

* test/src/eval-tests.el (eval-tests--exceed-specbind-limit)
(eval-exceed-specbind-with-signal-hook): Remove test that is
no longer useful, since there is no longer any specpdl limit
to overrun.  (The test still passed but vacuously so, by
hitting the max-lisp-eval-depth limit instead.)
This silences an obsoletion warning.